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TI-2026-80696 Aliases CVE-2026-84496GHSA-hq2w-pr84-vg8f

Out-of-bounds write in Apple macOS disk image handling

Priority LOW 29CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Apple macOS versions before 26.7.2 and before 27.2 are affected. An out-of-bounds write (CWE-787) can be triggered by mounting a maliciously crafted disk image. The attack requires user interaction, and it can terminate the system unexpectedly or corrupt kernel memory.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2, macOS Tahoe 26.7.2. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00462 40th percentileScored 2026-11-07
Fix Fixed macOS (Apple): 26.7.2, 27.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 26.7.2; before 27.226.7.2, 27.2Patch availableCNA
  • macOS VendorApple Affected before 26.7.2; before 27.2 Fixed in 26.7.2, 27.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*26.0 to before 26.7.2; 27.0 to before 27.2VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 26.0 to before 26.7.2; 27.0 to before 27.2 Vulnerable ·Apple

Remediation

Install macOS Tahoe 26.7.2 or macOS Golden Gate 27.2, the fixed versions for each product line.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA macOS (Apple) Fixed in 26.7.2, 27.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 26.7.2, 27.2

    17 records Highest priority Priority MEDIUM 4 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2026-80616 Memory handling flaw in Apple macOS lets apps crash the systemPriority MEDIUM 46
    • TI-2026-80871 Improper input validation in Apple iOS, macOS, visionOS and watchOSPriority MEDIUM 40
    • TI-2026-80649 Out-of-bounds read in Apple iOS, iPadOS and macOS causes system crashPriority MEDIUM 40
    Show all 17 records →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-84496
  2. 2026-10-27 CVSS score added · CISA ADP
  3. 2026-10-27 Weakness changed · CISA ADP
  4. 2026-10-27 CISA SSVC decision points changed
  5. 2026-10-27 Alias added: GHSA-hq2w-pr84-vg8f

References

Advisory 2

  • TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
See all 3490 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences